Yahoo needs to check the ads they run. A few of them are scams, Good ads and I would buy the items in a second. Never to receive them.
Should be a way for yahoo to see if the ad is real or not. Maybe check to see if you get an answer from their help line or something. Call or make the ads have a real phone number and address, require a address and a good phone number in the ad.
The one I'm talking about is GO SHOP If you run their help email you will get about a dozen different companies. That seems to easy for yahoo to check up on. If they care. Shame on you if you don't.